All children know that many birds with the onset of cold northern latitudes leave home and go on long journeys to the south.Why is this happening?Yes, because under a layer of snow is more difficult to find food, insects and ants, which you can enjoy in the summer, and the temperature is too low.However, our latitude is not leaving all the inhabitants of the heavenly heights.What birds fly south, and which are at home - we are closer look.
Reasons for the birds change their home
Each bird is a representative of the fauna, and at the same time, a separate kingdom among all the animals.These create a warm-blooded, their body temperature is an average of 40 degrees.With the onset of severe frosts birds begin to feel the lack of heat, feathers and down enough to cope with frosts.However, this situation is not unique to each type of the kingdom.Sparrows, magpies, crows, chickadees remain in their places in the temperate latitudes, as the structure of their bodies, the number of feathers and fat are much higher than the nomadic inhabitants of heaven.As a result, in response to the question "What birds fly south?" - We can say that first of all those that for physiological reasons, can not cope with the severe frosts.By the way, if a bird lives in a southern region (Rostov-on-Don, Belgorod), it does not leave their lands because of the cold.But if her birthplace - Norilsk, the flight to a southern region is an integral part of its life cycle.
food - an important criterion in the choice of residence
Speaking of which birds fly south, not to be missed, and power factor.Most of them are carnivorous hence their winter ration is reduced to zero.Birds that eat only bugs and little insects, get to the lands where the snow does not fall, so that their food remained full.Among them are the finches, blackbirds, crows, rooks.Also actively eat insects oatmeal, warblers, zoryanki.Also, talking about what kind of birds fly south due to lack of their usual food, you can not miss the swallows.They have something in the summer can eat large insects such as dragonflies, May beetles and the like on the fly.In the winter of our latitudes, so the meet is unreal.
What birds fly south in autumn?
With the first cold weather of our country leave the most heat-loving inhabitants of heaven.Among them are the swallows, crows, starlings, finches, buntings, cranes, blackbirds, larks.Of course, depart for warmer climates and large birds such as herons, cranes, storks, ducks, swans, hoopoe, wild geese, orioles and cuckoos.The reason for the departure of these birds is considered to be a lack of food, in particular, hibernate or die out all the insects that live in the summer.They were the first of all the migratory birds fly to the southern regions and the last return home.That is why the swallows can be seen on the street only from April.A wild swans return to their lake no earlier than May.
Consider what the birds fly away in winter in distant countries
when the cold has prevailed, our region is a bird may leave only if the cold would be too strong, or the food, such as chips, grains, seeds will not be on the streetsaltogether.Often in warmer countries sent tits, thrushes, woodpeckers, sometimes leave our lands bullfinches.These inhabitants of the sky easily tolerate frost, so the only thing that can make them fly - a lack of food.
